Cassette holder



FIG. 1 is a perspective view of a cassette holder showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevation view thereof which is a mirror image of the opposite side thereof;

FIG. 4 is an end elevation view thereof which is also a mirror image of the opposite end view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a cassette holder, as shown and described. 